diff --git a/internal/core/src/index/knowhere/utils/Utils.h b/internal/core/src/index/knowhere/utils/Utils.h
deleted file mode 100644
index 63f50c6b1c..0000000000
--- a/internal/core/src/index/knowhere/utils/Utils.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright (C) 2019-2020 Zilliz. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
-// with the License. You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software distributed under the License
-// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
-// or implied. See the License for the specific language governing permissions and limitations under the License
-
-#pragma once
-
-#include <cstdint>
-#include "exceptions/EasyAssert.h"
-
-namespace milvus {
-
-inline int64_t
-upper_align(int64_t value, int64_t align) {
-    Assert(align > 0);
-    auto groups = (value + align - 1) / align;
-    return groups * align;
-}
-
-inline int64_t
-upper_div(int64_t value, int64_t align) {
-    Assert(align > 0);
-    auto groups = (value + align - 1) / align;
-    return groups;
-}
-
-}  // namespace milvus